On Quantum Steering and Wigner Negativity - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Quantum Année : 2023

On Quantum Steering and Wigner Negativity

Mattia Walschaers

Résumé

Quantum correlations and Wigner negativity are two important signatures of nonclassicality in continuous-variable quantum systems. In this work, we investigate how both are intertwined in the context of the conditional generation of Wigner negativity. It was previously shown that when Alice and Bob share a Gaussian state, Bob can perform some measurement on his system to create Wigner negativity on Alice's side if and only if there is Gaussian steering from Alice to Bob. In this work, we attempt to generalise these findings to a much broader class of scenarios on which Alice and Bob share a non-Gaussian state. We show that if Alice can initially steer Bob's system with Wigner-positive measurements, Bob can remotely create Wigner negativity in Alice's subsystem. Even though this shows that quantum steering is sufficient, we also show that quantum correlations are in general not necessary for the conditional generation of Wigner negativity.

Dates et versions

hal-04245563 , version 1 (17-10-2023)

Identifiants

Citer

Mattia Walschaers. On Quantum Steering and Wigner Negativity. Quantum, 2023, 7, pp.1038. ⟨10.22331/q-2023-06-07-1038⟩. ⟨hal-04245563⟩
8 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More